Question

Mention the rules for writting the si units

Answer 1

✨ Answer ✨

Rules and conventions for writing SI units and their symbols.

1. The units named after scientists are not written with a capital initial letter.
2. The symbols of the units named after scientist should be written by a capital letter. ...
3. Small letters are used as symbols for units not derived from a proper name.

Explanation:

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Answer 2

1 . Numerical value of any physical quantity should be expressed in scientific notation.

For an example, density of mercury is 1.36 x 104 kg m-3 and not as 13600 kg m-3.

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2 . Only accepted symbols should be used.

For example : ampere is represented as A and not as amp. or am ; second is represented as s and not as sec.

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3 . Some space is always to be left between the number and the symbol of the unit and also between the symbols for compound units such as force, momentum, etc.

For example, it is not correct to write 2.3m. The correct representation is 2.3 m; kg m s-2 and not as kgms-2.

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4 . Use of solidus is recommended only for indicating a division of one letter unit symbol by another unit symbol. Not more than one solidus is used.

For example : m s-1 or m / s, J / K mol or J K-1 mol-1 but not J / K / mol.

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5 . When temperature is expressed in kelvin, the degree sign is omitted.

For example : 273 K not as 273o K

(If expressed in Celsius scale, degree sign is to be included. For example 100o C and not 100 C)